Harrow.



PATENTED APR, 1 4,"1903.

W. L. DEMPSEY.

HARROW. APPLICATION FILED MAY 2. 1902.

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cams vrrcqs co, manly No. 725,418. v PATENTED APR, 14, 1903;

W..L. DEMPSEY.-

HYARROW. APIfLIOATION FILED MAY 2. 1902.

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UNITED STATES.

WILLIAM L. DEMPSEY, OF FREDEBICKSBURG, VIRGINIA.

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SPECIFICATION forming part of Letters Patent 0. 725,418, datedApril14,1903. Application filed May 2. I902. Serial No. 105,679. (No model.)

' State of Virginia, have invented new and useful Improvements inHarrows, of which the following is a specification.

This invention relates to harrows andthe blades therefor, and theprimary object ofthe same is to provide a harrow which will morethoroughly break up or comminute the soil by a draw-cut operation incontradistinction to the usual drag of the ordinary harrowtooth.

A further object of theinvention is to provide a blade for a harrowwhich is constructed in such manner as to gradually depress into tagesin view, the invention consists in the construction and arrangement ofthe several parts, which will bemore fully hereinafter described andclaimed.

In the drawings, Figure l is a perspective view of a harrow embodyingthe features of the invention. Fig. 2 is atop plan view of the same.Fig. 3 is atop plan view of a slightly-modified form of the barrow. Fig.4 is a longitudinal vertical section on the line 4 4, Fig. 3. Fig. 5 isa detail perspective view of one of the harrow-blades.

Similar numerals of reference are employed to indicate correspondingparts in the several views.

The numeral 1 designates a supportingframe, which in the presentinstance has a square contour and is formed of suitable channel-iron toprovide flanges 2 to strengthen the same and at the same time lightenthe structure thereof and also to produce a groove 3, which isparticularly utilized at opposite tingencies.

forth. The flanges 2 are disposed inwardly andthe, outer surface of theframe is smooth; This particular form of frame may be varied at will anddifferent shapes em ployed without in theleast detracting from theoperation sought, and-for economyin the manufacture it is proposed toconstruct the frame from a single bar or piece of channel-iron which isbent into the shape shown and the terminals bolted together at thecenter of the front end,

one terminal being continued in advance of the other and shapedto'produoe a draft-eye 4 for the attachment of thedraft devices.

Extending across the frame at regular intervals is a series ofsupporting-rods 5, having heads at one end and nuts removably applied tothe opposite end, whereby the said rod may be removed and replaced atwill in varying the position and number of blades employed in the harrowto meetdifierent con- A plurality of blades 6 of a particular formareheld by the rods 5, and each blade has an upwardly-extending toe 7and a rearwardly-projecting heel 8, a hanger-arm 9 rising from thelatter and having a transversely-extending sleeve 10 immovably held inits upper terminal; transversely-extending sleeve 1] held therein, andin applying the blades to the harrow the supporting-rods 5 are passedthrough the sleeves 10- and 11. Each blade is formed with a lowerreduced or cutting edge 12,

which extends gradually in curved bevel form from the toe to theterminal of the heel, and

when the several blades are mounted within operation to be effected in avertical plane and in a downward direction. This operation is materiallyadvantageous over the or-' dinary' straight drag operation of harrow-The toe 7 also has a- PATENT OFFICE. i I

j sides in'a manner which will be presently set teeth now commonlyemployed, and whereby lumps or clods of soil are frequently thrown o1-tn rned to one side without becoming broken or comminuted andpulverization is only practically effected after a number of movementsof the harrow over the same surface or area. Moreover, it will be seenthat as the improved harrow moves forward the blades will graduallydepress toward theirheels, and in view of the greater depression beingat the heels of the blades a practical penetration of the broken soilfor a considerable extent will ensue at the heel portions of the blade,and thereby break up the lumps or clods which may have been turned over,and thus expedite the harrowing operation.

The sleeves 10 and 11 of the several blades hold the latterin properadjusted relation on the supporting-rods 5, and the several blades canbe disposed in various positions to facilitate the harrowing operationwith increased advantage in View of the construction and operation ofthe several blades, as set forth. In the arrangement shown by Figs. 1and 2 the blades are disposed in series of three, the two series at thefront being converged toward each other and the two rear seriessimilarly converged and positioned alternately in line with the centersof the spaces of the front series.

In Fig. 3 the blades are shown disposed in two series, those at thefront being inclined or obliquely disposed toward the left and those atthe rear also inclined or obliquely directed toward the right, the rearseries of blades having their front ends or toes held in line with thecenters of the spaces between the front series of blades. In this formof the harrow the front blades draw the soil over in one direction andthe rear blades push or move it in an opposite direction, and this operation, in conjunction with the shearing cutting action of theindividual blade, results in a thorough pulverization of the soiltreated. Another advantage of the improved harrow, in conjunction withthe disposition of the blades in alternation, so that one set or serieswill be positioned in line with the spaces between the set or series inadvance,is the treatment or breaking up of any lumps or clods that maybe drawnbetween the forward blade with obvious beneficial results.

Theim proved harrow maybe provided with as many blades as desired, andthe dimensions and proportions of the latter may be changed at will orto suit different kinds of work.

Another advantage in arranging the blades forward series will tend todraw the lumps or clods of soil between them for cutting or breaking upthe rear series. This operation is peculiarly effective when the bladesare disposed at an angle, as set forth.

Another advantage in the present construction is that two or more oftheseries of blades hereinbefore described are so disposed that theheels of the forward series project backwardly and beyond the toes ofthe rear series of blades, thereby causing the heels of the forwardseries of blades to hold lumps and clods, while the rearseries of bladesenter and cut into the said lumps and clods, and thereby completelypnlverize at one operation all the soil over which the harrow passes.

Having thus fully described the invention, what is claimed as new is- 1.In a barrow, the combination of a supporting-frame, and aseries of rigidblades immovably held at their opposite ends to the frame and ofelongated form, the blades having opposite'straight parallel sides andthe one series disposed to operate on the soil located between theblades of the other series and each blade having a lower downwardly andrearwardly inclined cutting edge, the greater portion of the cuttingedge being normally elevated.

2. Ablade for a harrow, consisting of an elongated rigid body havingopposite straight parallel sides and a lower cutting edge inclined fromthe front toe which projects above the upper edge of the body downwardlyto the rear heel projecting from the body, the latter having ahanger-arm rising vertically therefrom and the upper terminal thereoftogether with the upper end of the toe being formed withlaterally-projecting. sleeves.

3. In a barrow, the combination of a forward and a rear series ofblades, the blades having toes at their front extremities elevated abovethe backs thereof and rearwardlyprojecting heels, the heels of theforward series of blades projecting backwardly beyond and between thetoes of the rear series of blades, the blades at their rear ends havinghangers rigidly rising therefrom, and aframe havingtransversely-extending bars to which the upper ends of said hangers andthe toes of the several blades are directly and immovably connected.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM L. DEMPSEY.

Vitnesses:

T. L. W. GREEN, L. L. LAYTON.

